AnalysisAI ModelsAugust 9, 2026

Claude Opus 5 system prompt addresses export-control suspension

Claude Opus 5's system prompt notes that Claude Fable 5 and Mythos 5 were suspended June 12, 2026, due to U.S. Commerce export controls, lifted June 30, with access restored July 1. The prompt instructs Claude to confirm the events matter-of-factly and avoid personal opinions.

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Claude Opus 5 system prompt addresses export-control suspension — AIBriefs